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Showing articles 0 to 3 of 3 Filter Applied: headache,severe (Click to remove) A 63-Year-Old Man With Headaches and Behavioral Deterioration Neurol 68:782-787, Greenberg,S.M.,et al, 2007 Migraine NEJM 377:553-561, Charles, A., 2017 Behavior During a Cluster Headache Lancet 342:723-725, Blau,J.N., 1993 Showing articles 0 to 3 of 3